Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : $LiF$ is sparingly soluble in water.
Reason R : The ionic radius of $L{i}^{+}$ ion is smallest among its group members, hence has least hydration enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.

Answer 1

$LiF$ is sparingly soluble in water.
The low solubility of $LiF$ in water is due to its high lattice enthalpy (Since $L{i}^{+}$ and $F^{-}$ are small in size).
Also, due to small size of $L{i}^{+}$, its hydration enthalpy is high.
Hence, Assertion is true but Reason is false